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R. Kuja-Halkola

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Open access Sep 2026

Life stage shifts in salivary microbiota determinants: a cross-sectional study in twins

Both host genetics and environmental exposures shape the salivary microbiota; however, the relative contributions of these factors from early life to adulthood remain unclear. To address this, we profiled the salivary microbiota of 3387 twin pairs: 939 infant pairs (9–12 months) and 2,448 adult pairs (23–52 years) usin...

Simon Haworth, E. Bellou, R. Kuja-Halkola et al. · 0 citations
Open access Sep 2026

Major adverse cardiac events and mortality associated with ADHD and its treatment in adults with type 2 diabetes: a multi-national cohort study

Attention-deficit/hyperactivity disorder (ADHD) has been linked to elevated risk of type 2 diabetes (T2D). However, the impact of ADHD and ADHD medication use on prognosis and health outcomes in T2D remains unclear. This study investigates the associations of (1) ADHD and (2) ADHD medication use with rates of major adv...

Zi-Han Dong, Yi-Ling Zhou, Hong-Hui Yao et al. · 0 citations
Open access Sep 2026

Lifetime substance use disorder and suicidal behaviour: a population-based familial co-aggregation register study.

Substance use disorders (SUD) are associated with suicidal behaviour, but less is known regarding the extent to which familial factors influence these associations across different types of SUD. We performed a national register study including 4,209,615 individuals born in Sweden 1958-1999 and followed 1973-2020. Expos...

L. Khemiri, R. Kuja-Halkola, Henrik Larsson et al. · 0 citations
Open access Sep 2026

Characteristics of Monozygotic Twins Discordant for Anorexia Nervosa: Comprehensive Risk Evaluation for Anorexia Nervosa in Twins (CREAT) Study.

Findings support a multifactorial model of AN involving individual-specific influences and shared familial liability, and suggest that several clinical and phenotypic features may reflect familial liability for AN.

Hunna J. Watson, Elisabeth Welch, Elin Monell et al. · 0 citations
Open access Jul 2026

Tissue-specific clustering of genetic correlations across autoimmune diseases in a nationwide sibling study.

It is demonstrated that ADs share substantial cluster-specific genetic overlap that largely aligns with affected tissue types, leading to distinct groupings of connective tissue diseases, gastrointestinal disorders, and endocrinopathies, whereas diseases of the nervous system show limited genetic cohesion.

Daniel Eriksson, R. Kuja-Halkola, M. Holmqvist et al. · 0 citations
Open access Aug 2026

Real-world ADHD pharmacological treatment patterns and their association with negative clinical outcomes in youth with comorbid autism: a Swedish population-based study

The findings suggest that, rather than recommending fixed first-line and second-line treatments for individuals with ADHD-ASD, clinical guidelines should emphasise appropriate training as well as prompt and individualised treatment based on a shared decision-making process.

M. Garcia-Argibay, R. Kuja-Halkola, B. D'Onofrio et al. · 0 citations

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